resumo
Two new Mn(II) coordination polymers formed with molecular formula [Mn(H(2)O)(2)(HBTC)center dot(H(2)O)] 1 and [Mn(H(2)O)(2)(4,4 ' bipy)(HBTC)(2)]center dot(H4,4 ' bipy)(2) 2, where BTC = 1,2,4-benzenetricarboxylate and 4,4 ' bipy = 4,4 ' bipydine, have been synthesized via hydrothermal approach and characterized by single crystal X-ray diffraction techniques. 1 is composed of Mn-H(2)O-Mn 1D chains and further the chains are linked by HBTC ligands to form a 2D network in the ab plane; 2 is constructed by Mn-4,4 ' bipy-Mn 1D chains along the b direction with Mn(2+) ions coordinated to H(2)BTC and water as terminal ligands to form a 2D network. We also prepared a third compound with the molecular formula of [Mn(H(2)O)(HBTC)center dot(H(2)O)] which has been recently structurally reported elsewhere. The magnetic properties of the three compounds have been studied in detail under variable temperatures.
palavras-chave
COORDINATION POLYMERS; HYDROTHERMAL SYNTHESIS; CRYSTAL-STRUCTURE; MIXED-LIGANDS; TEMPERATURE; DISMUTASE; CATALYSTS; CLUSTERS; UNITS
categoria
Chemistry
autores
Shi, FN; Reis, MS; Brandao, P; Souza, AM; Felix, V; Rocha, J
nossos autores
Fa-Nian Shi
Investigador
João Rocha
Diretor
Paula Cristina Ferreira da Silva Brandão
Investigador
Vítor Félix
Professor Associado com AgregaçãoGrupos
1 - Nanomateriais inorgânicos funcionais e híbridos orgânico-inorgânico
5 - materiais biomédicos e biomiméticos
6 - simulação computacional e modelação multi-escala
agradecimentos
We thank FCT, POCTI, FEDER and FSE for financial support. MSR thanks CBPF-PCI program.